shram86, 
Single file D88 (PC-8801 disk format) tool for creating, editing, and adding data to disk files.
Has been working for me for a couple years, quickly ported the code from python to c++03 for portability.
#retrodev #gamedev #pc8801 #NEC #retrogaming #z80
https://github.com/bferguson3/pc88-asm/blob/master/tools/maked88.cpp
